DOI: 10.1002/2013GL059181
论文题名: Global time-dependent chorus maps from low-Earth-orbit electron precipitation and Van Allen Probes data
作者: Chen Y. ; Reeves G.D. ; Friedel R.H.W. ; Cunningham G.S.
刊名: Geophysical Research Letters
ISSN: 0094-10412
EISSN: 1944-10143
出版年: 2014
卷: 41, 期: 3 起始页码: 755
结束页码: 761
语种: 英语
英文关键词: Chorus Wave Distributions
; Low-Earth-orbit
; Precipitation Electrons
; Radiation Belts
; Time-dependent global chorus maps
; Van Allen Probes
Scopus关键词: Electromagnetic waves
; Geographical distribution
; Orbits
; Probes
; Radiation belts
; Chorus waves
; Electron precipitation
; In-situ observations
; Low-Earth orbit
; Precipitation measurement
; Radiation belt model
; Relativistic electron
; Whistler-mode chorus
; Electrons
; data set
; Earth science
; electron
; environmental monitoring
; measurement method
; numerical model
; precipitation (climatology)
英文摘要: Substorm injected electrons (several-100 s keV) produce whistler-mode chorus waves that are thought to have a major impact on the radiation belts by causing both energization and loss of relativistic electrons in the outer belt. High-altitude measurements, such as those from the Van Allen Probes, provide detailed wave measurements at a few points in the magnetosphere. But physics-based models of radiation-belt dynamics require knowledge of the global distribution of chorus waves. We demonstrate that time-dependent, global distributions of near-equatorial chorus wave intensities can be inferred from low-Earth-orbit (LEO) measurements of precipitating low-energy electrons. We compare in situ observations of near-equatorial chorus waves with LEO observations of precipitating electrons and derive a heuristic formula that relates, quantitatively, electron precipitation fluxes to chorus wave intensities. Finally, we demonstrate how that formula can be applied to LEO precipitation measurements and in situ Van Allen Probes wave measurements to provide global, data-driven inputs for radiation belt models. Key Points Demonstrate relation between chorus waves and precipitating low-energy electrons Precipitating e- fluxes as quantitative proxy for global distribution of chorus LEO e- observation has new significance for space weather monitoring/modeling ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893712217&doi=10.1002%2f2013GL059181&partnerID=40&md5=e7ee01863d69d7d7424eaeb196a204ff
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7676
Appears in Collections: 气候减缓与适应
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作者单位: Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Chen Y.,Reeves G.D.,Friedel R.H.W.,et al. Global time-dependent chorus maps from low-Earth-orbit electron precipitation and Van Allen Probes data[J]. Geophysical Research Letters,2014-01-01,41(3).